Green Blobs on a Red Planet: NASA Rover Spots ‘Enigmatic’ Rock
But the features do hint at how they formed on an ancient, wetter Mars. One of those lakes was in Jezero Crater, in which Perseverance landed three years ago. Those rock fossils are called stromatolites, and theystill form on Earth today. An abrasion patch in Mars' Serpentine Rapids.Image: NASA/JPL-Caltech Now, Perseverance has investigated another compelling target: the red rock with green spots. Hardly a smoking-gun for alien life, the stone nevertheless provides a window into Marsironicironyiron-richpast....